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linux/drivers/net/bna/bfa_ioc_ct.c
Rasesh Mody 1d32f76962 bna: IOC failure auto recovery fix 
Change Details:
	- Made IOC auto_recovery synchronized and not timer based.
	- Only one PCI function will attempt to recover and reinitialize
	the ASIC on a failure, that too after all the active PCI
	functions acknowledge the IOC failure.

Signed-off-by: Debashis Dutt <ddutt@brocade.com>
Signed-off-by: Rasesh Mody <rmody@brocade.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-12-25 19:16:03 -08:00

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/*
* Linux network driver for Brocade Converged Network Adapter.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License (GPL) Version 2 as
* published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
/*
* Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
* All rights reserved
* www.brocade.com
*/
#include "bfa_ioc.h"
#include "cna.h"
#include "bfi.h"
#include "bfi_ctreg.h"
#include "bfa_defs.h"
#define bfa_ioc_ct_sync_pos(__ioc) \
((u32) (1 << bfa_ioc_pcifn(__ioc)))
#define BFA_IOC_SYNC_REQD_SH 16
#define bfa_ioc_ct_get_sync_ackd(__val) (__val & 0x0000ffff)
#define bfa_ioc_ct_clear_sync_ackd(__val) (__val & 0xffff0000)
#define bfa_ioc_ct_get_sync_reqd(__val) (__val >> BFA_IOC_SYNC_REQD_SH)
#define bfa_ioc_ct_sync_reqd_pos(__ioc) \
(bfa_ioc_ct_sync_pos(__ioc) << BFA_IOC_SYNC_REQD_SH)
/*
* forward declarations
*/
static bool bfa_ioc_ct_firmware_lock(struct bfa_ioc *ioc);
static void bfa_ioc_ct_firmware_unlock(struct bfa_ioc *ioc);
static void bfa_ioc_ct_reg_init(struct bfa_ioc *ioc);
static void bfa_ioc_ct_map_port(struct bfa_ioc *ioc);
static void bfa_ioc_ct_isr_mode_set(struct bfa_ioc *ioc, bool msix);
static void bfa_ioc_ct_notify_fail(struct bfa_ioc *ioc);
static void bfa_ioc_ct_ownership_reset(struct bfa_ioc *ioc);
static void bfa_ioc_ct_sync_join(struct bfa_ioc *ioc);
static void bfa_ioc_ct_sync_leave(struct bfa_ioc *ioc);
static void bfa_ioc_ct_sync_ack(struct bfa_ioc *ioc);
static bool bfa_ioc_ct_sync_complete(struct bfa_ioc *ioc);
static enum bfa_status bfa_ioc_ct_pll_init(void __iomem *rb, bool fcmode);
static struct bfa_ioc_hwif nw_hwif_ct;
/**
* Called from bfa_ioc_attach() to map asic specific calls.
*/
void
bfa_nw_ioc_set_ct_hwif(struct bfa_ioc *ioc)
{
nw_hwif_ct.ioc_pll_init = bfa_ioc_ct_pll_init;
nw_hwif_ct.ioc_firmware_lock = bfa_ioc_ct_firmware_lock;
nw_hwif_ct.ioc_firmware_unlock = bfa_ioc_ct_firmware_unlock;
nw_hwif_ct.ioc_reg_init = bfa_ioc_ct_reg_init;
nw_hwif_ct.ioc_map_port = bfa_ioc_ct_map_port;
nw_hwif_ct.ioc_isr_mode_set = bfa_ioc_ct_isr_mode_set;
nw_hwif_ct.ioc_notify_fail = bfa_ioc_ct_notify_fail;
nw_hwif_ct.ioc_ownership_reset = bfa_ioc_ct_ownership_reset;
nw_hwif_ct.ioc_sync_join = bfa_ioc_ct_sync_join;
nw_hwif_ct.ioc_sync_leave = bfa_ioc_ct_sync_leave;
nw_hwif_ct.ioc_sync_ack = bfa_ioc_ct_sync_ack;
nw_hwif_ct.ioc_sync_complete = bfa_ioc_ct_sync_complete;
ioc->ioc_hwif = &nw_hwif_ct;
}
/**
* Return true if firmware of current driver matches the running firmware.
*/
static bool
bfa_ioc_ct_firmware_lock(struct bfa_ioc *ioc)
{
enum bfi_ioc_state ioc_fwstate;
u32 usecnt;
struct bfi_ioc_image_hdr fwhdr;
/**
* Firmware match check is relevant only for CNA.
*/
if (!ioc->cna)
return true;
/**
* If bios boot (flash based) -- do not increment usage count
*/
if (bfa_cb_image_get_size(BFA_IOC_FWIMG_TYPE(ioc)) <
BFA_IOC_FWIMG_MINSZ)
return true;
bfa_nw_ioc_sem_get(ioc->ioc_regs.ioc_usage_sem_reg);
usecnt = readl(ioc->ioc_regs.ioc_usage_reg);
/**
* If usage count is 0, always return TRUE.
*/
if (usecnt == 0) {
writel(1, ioc->ioc_regs.ioc_usage_reg);
bfa_nw_ioc_sem_release(ioc->ioc_regs.ioc_usage_sem_reg);
writel(0, ioc->ioc_regs.ioc_fail_sync);
return true;
}
ioc_fwstate = readl(ioc->ioc_regs.ioc_fwstate);
/**
* Use count cannot be non-zero and chip in uninitialized state.
*/
BUG_ON(!(ioc_fwstate != BFI_IOC_UNINIT));
/**
* Check if another driver with a different firmware is active
*/
bfa_nw_ioc_fwver_get(ioc, &fwhdr);
if (!bfa_nw_ioc_fwver_cmp(ioc, &fwhdr)) {
bfa_nw_ioc_sem_release(ioc->ioc_regs.ioc_usage_sem_reg);
return false;
}
/**
* Same firmware version. Increment the reference count.
*/
usecnt++;
writel(usecnt, ioc->ioc_regs.ioc_usage_reg);
bfa_nw_ioc_sem_release(ioc->ioc_regs.ioc_usage_sem_reg);
return true;
}
static void
bfa_ioc_ct_firmware_unlock(struct bfa_ioc *ioc)
{
u32 usecnt;
/**
* Firmware lock is relevant only for CNA.
*/
if (!ioc->cna)
return;
/**
* If bios boot (flash based) -- do not decrement usage count
*/
if (bfa_cb_image_get_size(BFA_IOC_FWIMG_TYPE(ioc)) <
BFA_IOC_FWIMG_MINSZ)
return;
/**
* decrement usage count
*/
bfa_nw_ioc_sem_get(ioc->ioc_regs.ioc_usage_sem_reg);
usecnt = readl(ioc->ioc_regs.ioc_usage_reg);
BUG_ON(!(usecnt > 0));
usecnt--;
writel(usecnt, ioc->ioc_regs.ioc_usage_reg);
bfa_nw_ioc_sem_release(ioc->ioc_regs.ioc_usage_sem_reg);
}
/**
* Notify other functions on HB failure.
*/
static void
bfa_ioc_ct_notify_fail(struct bfa_ioc *ioc)
{
if (ioc->cna) {
writel(__FW_INIT_HALT_P, ioc->ioc_regs.ll_halt);
writel(__FW_INIT_HALT_P, ioc->ioc_regs.alt_ll_halt);
/* Wait for halt to take effect */
readl(ioc->ioc_regs.ll_halt);
readl(ioc->ioc_regs.alt_ll_halt);
} else {
writel(__PSS_ERR_STATUS_SET, ioc->ioc_regs.err_set);
readl(ioc->ioc_regs.err_set);
}
}
/**
* Host to LPU mailbox message addresses
*/
static struct { u32 hfn_mbox, lpu_mbox, hfn_pgn; } iocreg_fnreg[] = {
{ HOSTFN0_LPU_MBOX0_0, LPU_HOSTFN0_MBOX0_0, HOST_PAGE_NUM_FN0 },
{ HOSTFN1_LPU_MBOX0_8, LPU_HOSTFN1_MBOX0_8, HOST_PAGE_NUM_FN1 },
{ HOSTFN2_LPU_MBOX0_0, LPU_HOSTFN2_MBOX0_0, HOST_PAGE_NUM_FN2 },
{ HOSTFN3_LPU_MBOX0_8, LPU_HOSTFN3_MBOX0_8, HOST_PAGE_NUM_FN3 }
};
/**
* Host <-> LPU mailbox command/status registers - port 0
*/
static struct { u32 hfn, lpu; } iocreg_mbcmd_p0[] = {
{ HOSTFN0_LPU0_MBOX0_CMD_STAT, LPU0_HOSTFN0_MBOX0_CMD_STAT },
{ HOSTFN1_LPU0_MBOX0_CMD_STAT, LPU0_HOSTFN1_MBOX0_CMD_STAT },
{ HOSTFN2_LPU0_MBOX0_CMD_STAT, LPU0_HOSTFN2_MBOX0_CMD_STAT },
{ HOSTFN3_LPU0_MBOX0_CMD_STAT, LPU0_HOSTFN3_MBOX0_CMD_STAT }
};
/**
* Host <-> LPU mailbox command/status registers - port 1
*/
static struct { u32 hfn, lpu; } iocreg_mbcmd_p1[] = {
{ HOSTFN0_LPU1_MBOX0_CMD_STAT, LPU1_HOSTFN0_MBOX0_CMD_STAT },
{ HOSTFN1_LPU1_MBOX0_CMD_STAT, LPU1_HOSTFN1_MBOX0_CMD_STAT },
{ HOSTFN2_LPU1_MBOX0_CMD_STAT, LPU1_HOSTFN2_MBOX0_CMD_STAT },
{ HOSTFN3_LPU1_MBOX0_CMD_STAT, LPU1_HOSTFN3_MBOX0_CMD_STAT }
};
static void
bfa_ioc_ct_reg_init(struct bfa_ioc *ioc)
{
void __iomem *rb;
int pcifn = bfa_ioc_pcifn(ioc);
rb = bfa_ioc_bar0(ioc);
ioc->ioc_regs.hfn_mbox = rb + iocreg_fnreg[pcifn].hfn_mbox;
ioc->ioc_regs.lpu_mbox = rb + iocreg_fnreg[pcifn].lpu_mbox;
ioc->ioc_regs.host_page_num_fn = rb + iocreg_fnreg[pcifn].hfn_pgn;
if (ioc->port_id == 0) {
ioc->ioc_regs.heartbeat = rb + BFA_IOC0_HBEAT_REG;
ioc->ioc_regs.ioc_fwstate = rb + BFA_IOC0_STATE_REG;
ioc->ioc_regs.alt_ioc_fwstate = rb + BFA_IOC1_STATE_REG;
ioc->ioc_regs.hfn_mbox_cmd = rb + iocreg_mbcmd_p0[pcifn].hfn;
ioc->ioc_regs.lpu_mbox_cmd = rb + iocreg_mbcmd_p0[pcifn].lpu;
ioc->ioc_regs.ll_halt = rb + FW_INIT_HALT_P0;
ioc->ioc_regs.alt_ll_halt = rb + FW_INIT_HALT_P1;
} else {
ioc->ioc_regs.heartbeat = (rb + BFA_IOC1_HBEAT_REG);
ioc->ioc_regs.ioc_fwstate = (rb + BFA_IOC1_STATE_REG);
ioc->ioc_regs.alt_ioc_fwstate = rb + BFA_IOC0_STATE_REG;
ioc->ioc_regs.hfn_mbox_cmd = rb + iocreg_mbcmd_p1[pcifn].hfn;
ioc->ioc_regs.lpu_mbox_cmd = rb + iocreg_mbcmd_p1[pcifn].lpu;
ioc->ioc_regs.ll_halt = rb + FW_INIT_HALT_P1;
ioc->ioc_regs.alt_ll_halt = rb + FW_INIT_HALT_P0;
}
/*
* PSS control registers
*/
ioc->ioc_regs.pss_ctl_reg = (rb + PSS_CTL_REG);
ioc->ioc_regs.pss_err_status_reg = (rb + PSS_ERR_STATUS_REG);
ioc->ioc_regs.app_pll_fast_ctl_reg = (rb + APP_PLL_425_CTL_REG);
ioc->ioc_regs.app_pll_slow_ctl_reg = (rb + APP_PLL_312_CTL_REG);
/*
* IOC semaphore registers and serialization
*/
ioc->ioc_regs.ioc_sem_reg = (rb + HOST_SEM0_REG);
ioc->ioc_regs.ioc_usage_sem_reg = (rb + HOST_SEM1_REG);
ioc->ioc_regs.ioc_init_sem_reg = (rb + HOST_SEM2_REG);
ioc->ioc_regs.ioc_usage_reg = (rb + BFA_FW_USE_COUNT);
ioc->ioc_regs.ioc_fail_sync = (rb + BFA_IOC_FAIL_SYNC);
/**
* sram memory access
*/
ioc->ioc_regs.smem_page_start = (rb + PSS_SMEM_PAGE_START);
ioc->ioc_regs.smem_pg0 = BFI_IOC_SMEM_PG0_CT;
/*
* err set reg : for notification of hb failure in fcmode
*/
ioc->ioc_regs.err_set = (rb + ERR_SET_REG);
}
/**
* Initialize IOC to port mapping.
*/
#define FNC_PERS_FN_SHIFT(__fn) ((__fn) * 8)
static void
bfa_ioc_ct_map_port(struct bfa_ioc *ioc)
{
void __iomem *rb = ioc->pcidev.pci_bar_kva;
u32 r32;
/**
* For catapult, base port id on personality register and IOC type
*/
r32 = readl(rb + FNC_PERS_REG);
r32 >>= FNC_PERS_FN_SHIFT(bfa_ioc_pcifn(ioc));
ioc->port_id = (r32 & __F0_PORT_MAP_MK) >> __F0_PORT_MAP_SH;
}
/**
* Set interrupt mode for a function: INTX or MSIX
*/
static void
bfa_ioc_ct_isr_mode_set(struct bfa_ioc *ioc, bool msix)
{
void __iomem *rb = ioc->pcidev.pci_bar_kva;
u32 r32, mode;
r32 = readl(rb + FNC_PERS_REG);
mode = (r32 >> FNC_PERS_FN_SHIFT(bfa_ioc_pcifn(ioc))) &
__F0_INTX_STATUS;
/**
* If already in desired mode, do not change anything
*/
if (!msix && mode)
return;
if (msix)
mode = __F0_INTX_STATUS_MSIX;
else
mode = __F0_INTX_STATUS_INTA;
r32 &= ~(__F0_INTX_STATUS << FNC_PERS_FN_SHIFT(bfa_ioc_pcifn(ioc)));
r32 |= (mode << FNC_PERS_FN_SHIFT(bfa_ioc_pcifn(ioc)));
writel(r32, rb + FNC_PERS_REG);
}
/**
* Cleanup hw semaphore and usecnt registers
*/
static void
bfa_ioc_ct_ownership_reset(struct bfa_ioc *ioc)
{
if (ioc->cna) {
bfa_nw_ioc_sem_get(ioc->ioc_regs.ioc_usage_sem_reg);
writel(0, ioc->ioc_regs.ioc_usage_reg);
bfa_nw_ioc_sem_release(ioc->ioc_regs.ioc_usage_sem_reg);
}
/*
* Read the hw sem reg to make sure that it is locked
* before we clear it. If it is not locked, writing 1
* will lock it instead of clearing it.
*/
readl(ioc->ioc_regs.ioc_sem_reg);
bfa_nw_ioc_hw_sem_release(ioc);
}
/**
* Synchronized IOC failure processing routines
*/
static void
bfa_ioc_ct_sync_join(struct bfa_ioc *ioc)
{
u32 r32 = readl(ioc->ioc_regs.ioc_fail_sync);
u32 sync_pos = bfa_ioc_ct_sync_reqd_pos(ioc);
writel((r32 | sync_pos), ioc->ioc_regs.ioc_fail_sync);
}
static void
bfa_ioc_ct_sync_leave(struct bfa_ioc *ioc)
{
u32 r32 = readl(ioc->ioc_regs.ioc_fail_sync);
u32 sync_msk = bfa_ioc_ct_sync_reqd_pos(ioc) |
bfa_ioc_ct_sync_pos(ioc);
writel((r32 & ~sync_msk), ioc->ioc_regs.ioc_fail_sync);
}
static void
bfa_ioc_ct_sync_ack(struct bfa_ioc *ioc)
{
u32 r32 = readl(ioc->ioc_regs.ioc_fail_sync);
writel((r32 | bfa_ioc_ct_sync_pos(ioc)), ioc->ioc_regs.ioc_fail_sync);
}
static bool
bfa_ioc_ct_sync_complete(struct bfa_ioc *ioc)
{
u32 r32 = readl(ioc->ioc_regs.ioc_fail_sync);
u32 sync_reqd = bfa_ioc_ct_get_sync_reqd(r32);
u32 sync_ackd = bfa_ioc_ct_get_sync_ackd(r32);
u32 tmp_ackd;
if (sync_ackd == 0)
return true;
/**
* The check below is to see whether any other PCI fn
* has reinitialized the ASIC (reset sync_ackd bits)
* and failed again while this IOC was waiting for hw
* semaphore (in bfa_iocpf_sm_semwait()).
*/
tmp_ackd = sync_ackd;
if ((sync_reqd & bfa_ioc_ct_sync_pos(ioc)) &&
!(sync_ackd & bfa_ioc_ct_sync_pos(ioc)))
sync_ackd |= bfa_ioc_ct_sync_pos(ioc);
if (sync_reqd == sync_ackd) {
writel(bfa_ioc_ct_clear_sync_ackd(r32),
ioc->ioc_regs.ioc_fail_sync);
writel(BFI_IOC_FAIL, ioc->ioc_regs.ioc_fwstate);
writel(BFI_IOC_FAIL, ioc->ioc_regs.alt_ioc_fwstate);
return true;
}
/**
* If another PCI fn reinitialized and failed again while
* this IOC was waiting for hw sem, the sync_ackd bit for
* this IOC need to be set again to allow reinitialization.
*/
if (tmp_ackd != sync_ackd)
writel((r32 | sync_ackd), ioc->ioc_regs.ioc_fail_sync);
return false;
}
static enum bfa_status
bfa_ioc_ct_pll_init(void __iomem *rb, bool fcmode)
{
u32 pll_sclk, pll_fclk, r32;
pll_sclk = __APP_PLL_312_LRESETN | __APP_PLL_312_ENARST |
__APP_PLL_312_RSEL200500 | __APP_PLL_312_P0_1(3U) |
__APP_PLL_312_JITLMT0_1(3U) |
__APP_PLL_312_CNTLMT0_1(1U);
pll_fclk = __APP_PLL_425_LRESETN | __APP_PLL_425_ENARST |
__APP_PLL_425_RSEL200500 | __APP_PLL_425_P0_1(3U) |
__APP_PLL_425_JITLMT0_1(3U) |
__APP_PLL_425_CNTLMT0_1(1U);
if (fcmode) {
writel(0, (rb + OP_MODE));
writel(__APP_EMS_CMLCKSEL |
__APP_EMS_REFCKBUFEN2 |
__APP_EMS_CHANNEL_SEL,
(rb + ETH_MAC_SER_REG));
} else {
writel(__GLOBAL_FCOE_MODE, (rb + OP_MODE));
writel(__APP_EMS_REFCKBUFEN1,
(rb + ETH_MAC_SER_REG));
}
writel(BFI_IOC_UNINIT, (rb + BFA_IOC0_STATE_REG));
writel(BFI_IOC_UNINIT, (rb + BFA_IOC1_STATE_REG));
writel(0xffffffffU, (rb + HOSTFN0_INT_MSK));
writel(0xffffffffU, (rb + HOSTFN1_INT_MSK));
writel(0xffffffffU, (rb + HOSTFN0_INT_STATUS));
writel(0xffffffffU, (rb + HOSTFN1_INT_STATUS));
writel(0xffffffffU, (rb + HOSTFN0_INT_MSK));
writel(0xffffffffU, (rb + HOSTFN1_INT_MSK));
writel(pll_sclk |
__APP_PLL_312_LOGIC_SOFT_RESET,
rb + APP_PLL_312_CTL_REG);
writel(pll_fclk |
__APP_PLL_425_LOGIC_SOFT_RESET,
rb + APP_PLL_425_CTL_REG);
writel(pll_sclk |
__APP_PLL_312_LOGIC_SOFT_RESET | __APP_PLL_312_ENABLE,
rb + APP_PLL_312_CTL_REG);
writel(pll_fclk |
__APP_PLL_425_LOGIC_SOFT_RESET | __APP_PLL_425_ENABLE,
rb + APP_PLL_425_CTL_REG);
readl(rb + HOSTFN0_INT_MSK);
udelay(2000);
writel(0xffffffffU, (rb + HOSTFN0_INT_STATUS));
writel(0xffffffffU, (rb + HOSTFN1_INT_STATUS));
writel(pll_sclk |
__APP_PLL_312_ENABLE,
rb + APP_PLL_312_CTL_REG);
writel(pll_fclk |
__APP_PLL_425_ENABLE,
rb + APP_PLL_425_CTL_REG);
if (!fcmode) {
writel(__PMM_1T_RESET_P, (rb + PMM_1T_RESET_REG_P0));
writel(__PMM_1T_RESET_P, (rb + PMM_1T_RESET_REG_P1));
}
r32 = readl((rb + PSS_CTL_REG));
r32 &= ~__PSS_LMEM_RESET;
writel(r32, (rb + PSS_CTL_REG));
udelay(1000);
if (!fcmode) {
writel(0, (rb + PMM_1T_RESET_REG_P0));
writel(0, (rb + PMM_1T_RESET_REG_P1));
}
writel(__EDRAM_BISTR_START, (rb + MBIST_CTL_REG));
udelay(1000);
r32 = readl((rb + MBIST_STAT_REG));
writel(0, (rb + MBIST_CTL_REG));
return BFA_STATUS_OK;
}
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